Structure B53028700000000 · Rock County, WI

Lrd Jackson Street over Rock River

Carries Lrd Jackson Street over Rock River, .3 Miles S Jct Sth 11.

Overall conditionFair

Set by its lowest-rated component: Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructure8/9 · Very Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT373 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 8/9Substructure 6/9 · sets the rating

373 ft end to end, longest span 92 ft: about 5 semi-trucks nose to tail. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built201412 years old
Length373.0 ft113.7 m
Daily traffic4,000counted 2022
Last inspectedAugust 2024every 48 months

Location

StateWisconsin
CountyRock
Location.3 Miles S Jct Sth 11
CarriesLrd Jackson Street
CrossesRock River
Coordinates42.67002, -89.01776

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length373.0 ft (113.7 m)
Max Span92.2 ft (28.1 m)
Deck Width56.4 ft (17.2 m)
Deck Area1955.6 sq m
Main Spans4
Year Built2014

Traffic

Avg Daily Traffic4,000 (2022)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 48 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure NumberB53028700000000

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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